What is the Tin – ColorAL process?
Known for years throughout the anodising industry and the process has found its application in several areas, of which architectural is well known. The process even has its own specific color definitions, going from C31 (light bronze) to C35 (black). The Tin – ColorAL process is an electrolytic colouring process based on tin(II)-salts and using AC for colouring. By using different and well stabilised Alficolor products, a big variety in bronze colours are accessible.
What colours are possible?
The colour spectrum from light bronze – via middle bronze to black
Further variations in colours
For the tin—colouring process, several ready-to-use products are available. They are containing the necessary amount of tin-salts and stabilisers already. Furthermore, separate Alficolor stabilisers support the throughing-power and stability of the bath solution. Their application is optional.
Advantages:
Reproducible bronze colours going from light bronze to black
Electrolytically dyed oxide layers, consequently a verifiably high level of colour stability
Consistent operations and process reliability thanks to stabilised dye solutions
Long bath life though low maintenance effort
Particularly decorative surfaces are possible in combination with mechanical pretreatment
Can be easily integrated into existing facilities
Individual components can be analysed; simple process management
Alficolor ready-to-use products and stabilizers
Alficolor product / stabilizer
Alficolor 673
Alficolor 677
Alficolor 679/1
Alficolor 693
Alficolor 697
Alficolor 699
Properties
Ready-to-use, it creates a cold bronze to black colour
Ready-to-use, it creates a neutral bronze to black colour
Ready-to-use, it creates a warm bronze to black colour
Stabiliser, it enables a cold bronze to black colour
Stabiliser, it enables a neutral bronze to black colour
Stabiliser, it enables a warm bronze to black colour
Simple operation
Typical dyeing parameters, e.g. by using Alficolor 677 (ready-to-use):
100 g/l
18 g/l
Colouring time
Temperature
Current
Alficolor 677
Sulfuric acid
0.5 – 15 minutes, depending on colour intensity
18 – 24 °C
AC, 50 Hz, 14-20 V, 0.2-1.0 A/dm²
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